Scan Tool Diagnostics - Data Display

Use a scan tool to read the status of inputs and outputs. Use this information to check that the module is sending and receiving the proper data. Each module uses data received from other vehicle modules in order to carry out some system functions. Therefore, if a module receives incorrect data from another vehicle module, the original module and system tested may function improperly. Use the scan tool in order to review the data coming from the module inputs and from other vehicle systems and modules that interact with that module.